Stepper motor - NEMA-17 size - 200 steps/rev, 12V 350mA : ID 324 : $14.00 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: RTELLIGENT Nema 17 Stepper Motor Bipolar Step Motor 1.8 Deg 68Ncm with Built-in 30cm Cable for 3D Printer CNC Router : Industrial & Scientific